Automatic gas-shut-off valve



1,468,135 I. H. CARR AUTOMATIC GAS SHUT-OFF VALVE Filed Aug. 21, 1922 2 Sheets-Sheet 1 INVENTOQ ISAAC H. CAEE XiTTOAEA/EY Sept. 18 1923.

Sept. 18

i. 1-1. CARR AUTOMATIC GAS SHUI 'O FF VALVE Filed Aug. 21, 1922 2 Shear,s-&',neet 2 ISAAC H. (Er-ma v ATTQDENEY Patented Sept. 18, 1923..

hdtdddli ,isAAC H. CARR, or Cincinnati, 0310.

' AUTOMATIC GAS-SHUT-OFE VALVE.

Application filed August 21, 1922. Serial No. 583,214.

To all wit-077?, it may concern:

Be it known that I, ISAAC H. CARR, a citie zen of the United States, residing at Cincinnati, in the countyof Hamilton and a State of 'Ohio, have invented certain new and useful Improvements in Automatic Gas-Shut-Off Valves, of which the following is a specification.

My invention re ates to safety means in no the use of combustible gases.

lVhere the ordinary types of valves are used serious accidents are caused .by the supply of gas being temporarily interrupted and thereby extinguishing the flame so that when the supply is resumed the gas is not consumed but pervades the building in which the device is located, forming a dangerous explosive mixture with the air and also subjecting persons in the building some asphyxiation especially where natural gas is used, as it has practically no perieptible odor whereby its presence is detected.

The objects of my invention are to pro- 25 vide a simple, efiicient and durable means for automatica ly shutting on the flow of gas or fluid under pressure when pressure is reduced below normal or no longer exists thereby providing safety means to prevent explosion, suffocation or asphyxiation due to the temporary stoppage in the flow of gas which extlnguishes the flame so that when pressure .1s resumed the gas is prevented from escaping into the rooms where as it would cause probable dangerous results.

It also serves to regulate the amount of gas supply to the device; provides means to compel the manual restoration of the valve to open position when the gas presao sure is restored; insures the absolute cutting off of the gas when pressure in the source of supply no longer exists; provides means whereby foreign matter is automatically removed from the valve seat and as serves to economize in the use ofgas and to keep the stove or furnace free from gas,

when for. any reason, the flame has been eX-- tinguished.

An advantage of my lnvention Is the safety afforded, as for instance," when the gas in the stove is unwittingly turned. on by a child. 1.

.My inventibnconsists in means whereby the above objects are accomplished and in "a theconstruction, combination and arrange 'inent of parts as herein set forth and claimed.

In the drawings: F 1 is a side elevation of the valve showing it in open position;

F 2 is a, plan view thereof; Fig. 3 is an end view; Fig. tis a vertical section on the line of Fig. *2;

Fig. 5 is a perspective view of the supply valve;

F 6 is a perspective view of thebypass valve; r

Fig. 7 is a perspective view partly broken away of the primary inverted cup shaped floating valveand secondary conical valve with connecting parts; v F 8 is a perspective view showing the inlet valve open and the by-pas's valve closed in position for the gas to pass therethrough;

F 9 is a perspective view of the lock washer; and

Fig. 10 is a plan view of the device with supply valve in set position and with cap 7 and interior parts removed.

In the. embodiment of. my inventionas illustrated and which shows a preferred construction I provide a safety valve body 1 having an integrally formed inlet connection 2 and an integrally formed outlet councction 3. The valve body is provided in its top with aveircular space 4L, and extend ing downwardly therefrom I provide a cylindrical valve chamber 5 having grooved passages 6 in its wall extending from space 4 downwardly in valvechamber 5. Immediately below said valve chamber is formed threaded opening 7 in which a threaded cylindrical bearing 8, having central vertical opening 9, is screwed. Immediately below said bearing is a secondary cylindrical valve chamber '10 and below said valve chamber is a cylindrical outlet 11 of less diameter than said valve chamber whereby a sharp or angular circularvalve seat 12 is formed. ;A gas passage 13 extends from space 4 downwardly into the secondary valve chamber near its top. By-pass 14.: extends from said passageto gas outlet 3 and is provided witlr valve 15. The upper end of safety valve body 1 is externally screw threaded to receive-screw threaded cap 16 on rubber gasket "17' to securely close the same. V p p The primary safety valve is preferably primary valve chamber.

'cal nut 24, as shown in Fig. 7, may be substances which may adapts itself to continuous periectseatmg with stop formed of aluminum orother light material in the shape of an inverted cup 18 with a hole 19 centrally through its upper closed end. Stem 20 having cone secondaryvalve 21. on its lower end extends upwardly through said opening 9 and hole 19 and said primary valve is held in. adjusted position thereon. by conical nuts 22 and 23 having threaded engagement with said stem, thereby permitting some play of said primary valve upon said stem to adapt it to move freely and not bind against the wall of the Supplemental coni used if desired to lock nut 22' in position. The lower end of stem 20 is seatedin bearing 8 and its upper end is seated in socket 25 of screw threaded cap 16 and said stem is adapted to freely move up and down in said bearin and socketwhen said valves are moved. Conical valve 21 18 adapted to term "a close tit'with its seat 12 and possesses the advantage of readily dislodging anyforeign lodge thereon. It also notwithstanding any wear of the parts. Inletconnection 2 is PITOVltlGClWltll gas nlet QG eXtending from'its threaded end 27 to primary cylindrical valve chamber elshortly below the lower ends of grooved passages 6 and it is also provided with aresetting gas 1nlet28 extending from said threaded opening to said primary valve chamber below said gas inlet/26.

Inlet connection 2 is provided withtapered opening 29 extending' transversely therethrough to receive spigot 0r valve plug 30 havmg gas passages 31 and 32 extending transversely therethrough in different directions. Said spigot is provided with operating handle 83 and in position by nut 35 tion. It is secured upon its threaded end, said nut bearing upon interposed lock washer 36.

The several parts are assembled in the positions clearly shown in full lines in Fig.

f l and is interposed in the gas connection leading from-the source of gas supply to 1 When thus connected 7 the stove "or furnace.

and in the position shown'by full lines'in "Fig. l thegas'will pass through gas inlet '26, primary cylindrical valve'chamber 5, grooved passages valve chamber 10 and the pressure of the gas causing said primary passage 13, secondary valve to remain suspended in the upper end of said valve chamber and the secondary" valve to be unseated whereby the gas '1s;per-' linitted to escape upwardly through the lower ends-0t said grooves and discharge through outlet 3 to aburner in a stove or furnace. When, however, the pressure becomes .weak

a or the flow of gas is temporarily interrupted or said primary valve will drop ,by'gravity to 'the'point indicated by dotted lines in Fig.

34: to limit its open or closed posi- J cylindrical outlet 11, a

.4 and will carry with it said cone valve 21 forcing it upon-seat 12;thereb y. closing'the safety cut-off by both the primary and seconuary valves and should the gas pressure he resumed it will be securely closed against passage therethrough by both the primary and secondary valves. 7

In order to reset the device'ter the con tinualflow of gas Itherethrough it is only necessary to turn the spigot to set position,so that the transverse-passage Ell will coinci'd'e with resetting gas inlet 28 whereuponthe gas will enter primary valve 18 in its dotted position, l, thereby forcing it upwardlyes soonjasbvpass valve 17-} has. been momentarily turnedto open position to permit the escape of anvresidual gas'abovc said primary and secondary valves.

' Then turn the spigot to "Von position, shown in Figs, 1- 2 and i thereby closing setting gas inlet 28 and opening gas inlet thus restoringfthe device to its operaT position 'fOrthe regular passageot'gastherethrough" under normal:conditions and until 'thcprimailii and secondary valves'are'again closed due-to insi l'lllGiQTlt gas pressure er tom per: ry: stoppage in the flow of gas a j -My salety cut ofl is'cxtreine ly simple. compactfand o' 'economic'al construction a is adapted to e'l'lectually perform the desil functions. f-

VThile I have shown and described a pai ticular construction and arrangement o! partslit will bea 'iparent that it is capable or, 7 some modification without departure from its scope orspirit as defined in the' claims.

VVhat Iclaim as new and .desire to secure by LetterszPatent is: V H

l. In an automatic gas shut-oil'- valve l zi valve body having a primary valve chamber anda secondary alve chamber thereliieloiv, said valve body having spa cein its upper" end and grooves in the upper end wall said primar valve chamber coininuuicatin with said space and having a passage lead-- ing from said space into said second: v valve chamber-{a primarylloating valvein said primary valve chamber; a secondary valve in said secondary valve chamber, a vertical slidable stem on which said prin iary and secondary valvesl'are mounted, l7 valve body having a inlet below s grooves and a i 'e-etting gas inlet below first named 'gaslinlet, a" valve adapted 'open and: close saidinlets, said valve body having a discharge outlet and a by-passleading trom -therpassage to said, discharge outlet. and means to open and close said by v pass, substantially assetforthand tor the purposes specified. a i i r 2. In an automatic gas shut-oil: valve,a valve body having a primary v'aive chamber 7 and a secondarvva'lve chamber therebelow' having a sharp -edgedcircular seat and hav- V ing apassage forming" communication thetween said valve chambers, a primary oating valve in said primary valve chambc chamber adapted to rest upon said sharp edged circular seat, a vertical slidable stem on which said primary and secondary valves are mounted, said valvebody having a gas inlet below the outlet of said primary valve chamber and a resetting gas inlet below said first named gas inlet, valve adapted to simultaneoi'isly open one of said inlets, while closing the other inlet, said valve body having a discharge outlet and a by-pass leading from said passage to said discharge outlet,

substantiallv as set forth and for the purposes speciued.

.3. Inan automatic gas shut-oif valve, a

valve body having a primary valve chamber and a seoondary'valve chamber therebelow, said primary valve chamber having a grooved outlet and said valve body having a space above said primary valve chamber with which said grooved outlet communicates and having a passage leading from said space into said secondary valve cham her, a primary inverted cup shaped loosely mounted floating valve in said primary valve I chamber, a secondary valve in said secondary valve chamber supported by said primary valve, a vertical slidable stem on which said primary and secondary valves are mounted, a gas inlet below the gas outlet in said primary valve chamber, a resetting gas inlet below said first named gas inlet and a valve adapted to open and close said gas inlets, substantially as set forth and for the purposes specified.

i. In an automatic gas shutolf valve, a valve body having a primary valve chamber and a secondary valve chamber, said primary valve chamber having a grooved outlet and said valve body having a space above said primary valve with which said grooved outlet communicates and having a passage leading from said space into sald-secondary valve chamber, a floating valve in said primary valve chamber, a cone valve in said secondary valve chamber, a vertical shdable stemron which said floating and cone valves are mounted, a resetting gas inlet below said 1 first named inlet, and a valve adapted to open and close said gas inlets, substantially as set forth and for the purposes specified.

5. In an automatic gas shut-off valve, a valve body having a primary valve chamber and a secondary valve chamber and having a passage connecting said chambers, a priunary inverted cup shaped tilting floating valve in said primaryvalve chamber, a

secondary valve in said secondary valve chamber supported by sald prlmary valve,

ii a. .7 a secondary cone valve in said secondary valve a gas inlet below the gas outlet in said primary valve chamber, a resetting gas inlet below said first named gas inlet and means to control the flow of gas through said gas inlets, substantially as set forth and for the purposes specified.

6. In an automatic gas shut-off valve having a primary valve chamber and a secondary valve chamber arranged below said primary valve chamber and having a passage leading from said primary valve chamher to said secondary valve chamber, an "inverted cup shaped valve in said valve chamber, a secondary valve in said secondary valve chamber, a stem supporting said secondary valve and adjustably attached to said primary valve, a gas inlet, a resetting gas inlet below said first named gas inlet,

inlets, respectively.

7. In'an automatic gas shut-off valve having a primary valve chamber and a secondary valve chamber with a passage leading from said primary valve chamber to said secondary valve chamber, a primary valve in said primary valve chamber, a secondary valve in said secondary valve chamber, a threaded stem to which said primary valve is attached and extending through said primary valve and tapered nuts secured above and below said primary valve whereby said valve is adapted to be adjusted therein rela tive to said secondary valve and whereby said primary valve is adapted to be tiltably mounted thereon to permit it to move freely in said primary valve chamber without binding 8. In an automatic gas shut-off valve, a valve body having a primary valve chamber and a secondary valve chamber therebelow, said primary valve chamber having a grooved outlet and said valve body having a space above said primary valve chamber with which said grooved outlet communi- Gates and having a passage leading from said space into said secondary valve chamber, a primary floating valve in said primary valve chamber, a secondary valve in said secondary valve chamber, a vertical slidable stem on which said primary and secondary valves are mounted, said valve body having a gas inlet below said grooved outlet and a resetting gas inlet below said first named gas inlet, a valve adapted to simultaneously open and close said inlets, said valve body having a discharge outlet, and a valved by-pass leading from said passage to said discharge outlet, substantially as set forth and for the purposes specified.

ISAAC H. CARE. 

